Incident Overview

Date: Thursday 11 August 2016
Aircraft Type: Antonov An-2R
Owner/operator: ALROSA
Registration Number: RA-17812
Location: Polyarnyj Airport (PYJ) – ÿ Russia
Phase of Flight: Landing
Status: Substantial
Casualties: Fatalities: 0 / Occupants: 3
Component Affected: Left main landing gear legLeft main landing gear leg
Investigating Agency: MAKMAK
Category: Accident
Onboard an Antonov 2R, two crew members and one passenger experienced a runway excursion during landing rollout. The left main landing gear leg failed due to a crew action ? the second pilot transferring control to the pilot for braking and rollout ? resulting in the aircraft rolling off the runway. Contributing factors included the aircraft?s design features, specifically the possibility of braking the wheels only from the PIC seat, and the lack of a tail wheel locking mechanism. The absence of relevant AFM and ALROSA documents regarding control transfers after landing further exacerbated the situation.Onboard an Antonov 2R, two crew members and one passenger experienced a runway excursion during landing rollout. The left main landing gear leg failed due to a crew action ? the second pilot transferring control to the pilot for braking and rollout ? resulting in the aircraft rolling off the runway. Contributing factors included the aircraft?s design features, specifically the possibility of braking the wheels only from the PIC seat, and the lack of a tail wheel locking mechanism. The absence of relevant AFM and ALROSA documents regarding control transfers after landing further exacerbated the situation.

Description

The Antonov 2R was engaged in an aeromagnetic survey flight. On board were two crew members and one passenger. During landing rollout the aircraft suffered a runway excursion. The left hand main landing gear leg failed as the aircraft came to rest on rough terrain. CAUSE (translated from Russian): The most likely cause of the accident with the AN-2 RA-17812 were uncoordinated actions of crew members after landing, when the second pilot transferred control to the PIC for braking and rollout, which with the presence of crosswind from the left within the allowable limits, led the aircraft to roll off the side of the runway, causing damage to the aircraft. Contributing factors, most likely, were: – design features of the An-2 RA-17812, associated with the possibility of braking the wheels of the landing gear only from the PIC seat, and the absence of a locking mechanism for the tail wheel; – absence of information in the An-2 Aircraft flight manual (AFM) and ALROSA documents on the transfer of controls after landing and corresponding commands when the copilot is landing.

Source of Information

http://vssut.sledcom.ru/news/item/1060399/, http://mak-iac.org/rassledovaniya/an-2-ra-17812-11-08-2016http://vssut.sledcom.ru/news/item/1060399/, http://mak-iac.org/rassledovaniya/an-2-ra-17812-11-08-2016

Primary Cause

Crew coordination failure during landing rollout, leading to the second pilot transferring control and triggering a runway excursion.Crew coordination failure during landing rollout, leading to the second pilot transferring control and triggering a runway excursion.

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